Various app development tasks, UI, multithreading, porting, Mac/Windows, c++, Objective C, C-sharp

I am looking for coder(s) for short/medium term contracts to work on my desktop sound post production app. A variety of potential jobs including: - Upgrading and tidying the Objective C Mac UI - Porting Mac app to Windows, maybe c-sharp, maybe c++WinRT - Improving async/modal elements like background tasks, progress bars, modal dialogs etc - Other architectural considerations in the c++ backend Could be independent work, zoom collab, or in-person collab (London).